package com.aaa.day1106.day110603;



import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @author ${崔灿}
 * @date 2022/11/06 18:37
 **/

public class Test01 {
    public static void main(String[] args) {
        List<Person3> personList = new ArrayList<>();
        personList.add(new Person3("欧阳雪",18,"中国",'F'));
        personList.add(new Person3("Tom",24,"美国",'M'));
        personList.add(new Person3("Harley",22,"英国",'F'));
        personList.add(new Person3("向天笑",20,"中国",'M'));
        personList.add(new Person3("李康",22,"中国",'M'));
        personList.add(new Person3("小梅",20,"中国",'F'));
        personList.add(new Person3("何雪",21,"中国",'F'));

        //map映射操作--名称
        //personList.stream().map(item->item.getName()).forEach(System.out::println);

        //sort排序操作--年龄
        //personList.stream().sorted((o1,o2)->Integer.compare(o1.getAge(),o2.getAge())).forEach(System.out::println);

        //find操作--findFirst 获取流中第一个元素
        //Optional<Person3> person3 =personList.stream().findFirst();
        //System.out.println(person3.get());

        //find操作---findAny（） 获取流中任意一个元素 必须使用并行流测试
        //Optional<Person3> any = personList.parallelStream().findAny();
        //System.out.println(any.get());

        //匹配操作--所有元素都必须匹配条件才返回true
        //boolean b = personList.stream().allMatch(item->item.getAge()>20);
        //System.out.println(b);

        //聚合操作--count
        //long count = personList.stream().count();
//        System.out.println("个数为："+count);

        //聚合操作max min
        //Optional<Person3> max = personList.stream().max((o1,o2)->o1.getAge()-o2.getAge());
        //Optional<Person3> min = personList.stream().min((o1,o2)->o1.getAge()-o2.getAge());
        //System.out.println(min);

        //collect 收集操作
        //Long collect = personList.stream().collect(Collectors.counting());
        //System.out.println(collect);

        //Double collect = personList.stream().collect(Collectors.averagingInt(item->item.getAge()));
        //System.out.println(collect);

        //Optional<Person3> collect= personList.stream().collect(Collectors.minBy((o1,o2)->o1.getAge()-o2.getAge()));
        //System.out.println(collect);

        //Integer collect = personList.stream().collect(Collectors.summingInt(item->item.getAge()));
        //System.out.println(collect);

        //收集为一个新的集合
        //Set<Person3> set = personList.stream().collect(Collectors.toSet());
        //System.out.println(set);

        //map
        //Map<String,Person3> map = personList.stream().filter(item -> item.getAge() > 20).filter(item -> item.getCountry().equals("中国")).collect(Collectors.toMap(item -> item.getName(), item -> item));
        //System.out.println(map);

        //分组操作
        Map<Character, List<Person3>> collect = personList.stream().collect(Collectors.groupingBy(item -> item.getSex()));
        System.out.println(collect);

    }
}
class Person3  {
    private String name;
    private Integer age;
    private String country;
    private char sex;

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", country='" + country + '\'' +
                ", sex=" + sex +
                '}';
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public char getSex() {
        return sex;
    }

    public void setSex(char sex) {
        this.sex = sex;
    }

    public Person3(String name, Integer age, String country, char sex) {
        this.name = name;
        this.age = age;
        this.country = country;
        this.sex = sex;
    }
}

